yeah, when I tried to render all the lights and textures my computer popped like a Lamborghini then died quickly. also, this is not great but good enough for me to consider it a masterpiece (also I modeled this in blender download it if you want a free modeling software)
here is the link to the reference I used https://www.google.com/search?q=sci+fi+pistol+artstation&tbm=isch&hl=en-GB&chips=q:sci+fi+pistol+artstation,online_chips:weapon+concept+art&hl=en-GB&sa=X&ved=2ahUKEwimmKX04MjsAhUpcjABHbRDClcQ4lYoAXoECAEQFg&biw=2467&bih=1249#imgrc=Ra46_a95ZMW17M